CN104935390A - Synchronized low-energy detection technique - Google Patents
Synchronized low-energy detection technique Download PDFInfo
- Publication number
- CN104935390A CN104935390A CN201510106272.4A CN201510106272A CN104935390A CN 104935390 A CN104935390 A CN 104935390A CN 201510106272 A CN201510106272 A CN 201510106272A CN 104935390 A CN104935390 A CN 104935390A
- Authority
- CN
- China
- Prior art keywords
- electronic equipment
- beacon
- beacon period
- transmitting time
- transmission electronic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
- H04W56/0015—Synchronization between nodes one node acting as a reference for the others
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
The invention discloses a synchronized low-energy detection technique. In order to reduce the power consumption after a transmitting electronic device in a wireless network has been detected, a receiving electronic device calculates transmit times of subsequent beacons from the transmitting electronic device based on a clock drift of the transmitting electronic device and the beacon period. Then, the receiving electronic device receives the subsequent beacon by opening scan windows that encompass the calculated transmit times. However, because the transmit times are more predictable after the transmitting electronic device has been detected (and the clock drift of the transmitting electronic device is known to the receiving electronic device), the receiving electronic device can reduce the width of the scan windows. In addition, the transmitting electronic device can further reduce the power consumption by increasing the beacon period.
Description
Background technology
Technical field
Embodiment described in the invention relates to and reduces the technology of power consumption by synchronous to the detection of electronic equipment in wireless network.
Association area
Many modern electronic equipments include for carrying out the Networking subsystems of radio communication with other electronic equipments.Such as, these electronic equipments can comprise Networking subsystems, this Networking subsystems has cellular network interface (UMTS, LTE etc.), wireless lan interfaces (such as, the such as wireless network described in IEEE-USA (IEEE) 802.11 standard or the bluetooth from Bluetooth SpecialInterests Group (Kirkland, Washington)
tM) and/or the wave point of another kind of type.
In a lot of wireless communication protocol, electronic equipment by periodic broadcasting beacon and scanning come mutually to detect from the beacon of other electronic equipments.Such as, utilize in the wireless network and can periodically wake its radio unit up with the electronic equipment that communicates with another electronic equipment of communication protocol of IEEE 802.11 standard (being sometimes referred to as " Wi-Fi ") compatibility, with at beacon transmitting time place received beacon frame.
But, regularly send and receive these beacons and usually cause network subsystem power consumption remarkable.Therefore, the existing detection technique in wireless network may reduce the running time of electronic equipment, and this may reduce Consumer's Experience.
Summary of the invention
Embodiment described in the invention comprises reception electronic equipment.This reception electronic equipment comprises: antenna; And interface circuit, this interface circuit is couple to antenna, communicates with the transmission electronic equipment in wireless network.Interface circuit is during scanning window, and detect transmission electronic equipment by receiving the beacon had in one group of beacon of initial Beacon Period, wherein interface circuit uses the scanning window with home window width and home window cycle.Then, interface circuit calculates the transmitting time of the subsequent beacon from transmission electronic equipment based on the clock drift and/or initial Beacon Period that send electronic equipment.Next, interface circuit receives subsequent beacon from transmission electronic equipment between follow up scan window phase, and follow up scan window contains the transmitting time of the calculating of subsequent beacon, and wherein follow up scan window has the width being less than original width.
In certain embodiments, after transmission electronic equipment being detected, interface circuit provides the beacon period of correction to sending electronic equipment, the beacon period wherein revised is greater than initial Beacon Period, and the transmitting time calculated of subsequent beacon also calculates based on the beacon period revised.
In addition, send electronic equipment and receive in the follow-up time of the lock in time between electronic equipment being greater than, interface circuit can come to receive subsequent beacon from transmission electronic equipment at home window cycle place's scanning window with original width by opening.Therefore, after lock in time, receive electronic equipment and can be returned to initial examination and measurement technology.
In addition, in follow-up time, the size of follow up scan window can increase in time, and the increase of size can be proportional with clock drift.
Receive the clock drift that electronic equipment can obtain or determine to send electronic equipment in several ways.Particularly, send after electronic equipment detecting, interface circuit can: receive from sending electronic equipment the information being used to specify initial Beacon Period and clock drift; Receive the beacon sent, and based on sent beacon determination initial Beacon Period and clock drift; The information of initial Beacon Period and clock drift is used to specify via access to netwoks; And access is stored in the information receiving appointment initial Beacon Period in electronic equipment and clock drift.
In certain embodiments, interface circuit is via network reception network clocking, and wherein calculated transmitting time is clock Network Based also.Then, the transmitting time of subsequent beacon and network clocking compare by interface circuit.When difference when sending and between the transmitting time calculated exceedes threshold value, interface circuit provides synchronous correction to transmission electronic equipment.
Should be noted, in certain embodiments, at least some aforementioned operation that interface circuit performs is performed by processor, and this processor performs the program module of the instruction comprised at least some aforementioned operation.
Another embodiment provides a kind of computer program for using together with reception electronic equipment.This computer program comprises the instruction operated by least some received in the operation of electronic equipment execution.
Another embodiment provides a kind of for sending electronic equipment and the method receiving communication between electronic.At least some that the method comprises by receiving in the operation of electronic equipment execution operates.
Another embodiment provides transmission electronic equipment.This transmission electronic equipment comprises: antenna; And interface circuit, this interface circuit is couple to antenna, communicates with the reception electronic equipment in wireless network.In addition, interface circuit sends beacon based on initial Beacon Period.Then, interface circuit receives from receiving electronic equipment the beacon period revised, and the beacon period wherein revised is greater than initial Beacon Period.Next, interface circuit sends beacon based on the beacon period revised.
Should be noted, send electronic equipment and can comprise the clock circuit with clock drift, and the clock that can export based on clock circuit sends beacon at transmitting time place.In addition, interface circuit can via network reception network clocking, wherein clock circuit clock output clock Network Based.Then, interface circuit can receive synchronous correction from reception electronic equipment.Next, interface circuit can regulate clock circuit based on synchronous correction, makes the difference between the multiple of clock and network clocking be less than threshold value.
In certain embodiments, when sending beacon, interface circuit is provided for the information of appointment initial Beacon Period and clock drift to receiving electronic equipment.
Another embodiment provides a kind of computer program for using together with transmission electronic equipment.This computer program comprises the instruction operated by least some sent in the operation of electronic equipment execution.
Another embodiment provides a kind of for sending electronic equipment and the method receiving communication between electronic.At least some that the method comprises by sending in the operation of electronic equipment execution operates.
Accompanying drawing explanation
Fig. 1 shows the block diagram of the electronic equipment carrying out radio communication according to embodiment of the present disclosure.
Fig. 2 shows according to the sequential chart of embodiment of the present disclosure in the communication between electronic of Fig. 1.
Fig. 3 shows according to the sequential chart of embodiment of the present disclosure in the communication between electronic of Fig. 1.
Fig. 4 shows according to the sequential chart of embodiment of the present disclosure in the communication between electronic of Fig. 1.
Fig. 5 shows according to embodiment of the present disclosure for carrying out the flow chart of a kind of method communicated between the electronic equipment of Fig. 1.
Fig. 6 shows according to embodiment of the present disclosure for carrying out the flow chart of a kind of method communicated between the electronic equipment of Fig. 1.
Fig. 7 shows according to the diagram of embodiment of the present disclosure in the communication between electronic of Fig. 1.
Fig. 8 shows the block diagram of one of the electronic equipment of the Fig. 1 according to embodiment of the present disclosure.
Should be noted, similar drawing reference numeral refers to the corresponding component in whole accompanying drawing.In addition, the Multi-instance of same parts is demarcated by common prefix, and this common prefix is separated by broken broken line and example label.
Embodiment
In order to reduce power consumption after the transmission electronic equipment (such as transducer) in wireless network being detected, receive electronic equipment (such as smart mobile phone) calculates the subsequent beacon from transmission electronic equipment transmitting time based on the clock drift and beacon period that send electronic equipment.Then, receive electronic equipment and receive subsequent beacon by opening the scanning window containing calculated transmitting time.But because after transmission electronic equipment being detected, transmitting time more measurable (and the clock drift sending electronic equipment is known to reception electronic equipment), so receive the width that electronic equipment can reduce scanning window.In addition, send electronic equipment and can reduce power consumption further by increasing beacon period.Receive electronic equipment to monitor and the synchronous situation sending electronic equipment based on the beacon transmitting time of reality, and synchronous correction can be provided to keep synchronous to transmission electronic equipment, thus allow the beacon period of continuing the less scanning window of use and/or increase.
Such as, beacon, the information of specifying clock drift and synchronous correction is passed on, communication protocol all IEEE-USAs in this way (IEEE) 802.11 standard, bluetooth in the grouping that can send according to communication protocol receiving the radio unit in electronic equipment and receive
tM(from Bluetooth SpecialInterests Group (Kirkland, Washington)) and/or another kind of wave point.In the following discussion, by bluetooth
tMas illustrative example.
Communication between electronic equipment is shown in Fig. 1, has which show the block diagram that the electronic equipment 110 and 112 carrying out radio communication is shown.Particularly, these electronic equipments can carry out radio communication, simultaneously: detect each other, send and receive beacon or beacon frame over the wireless channel, connect (such as, by sending connection request) by scanning wireless channel and/or send and receive grouping (it may comprise request and/or additional information as payload).
Described in following reference diagram 8 is further, electronic equipment 110 and 112 can comprise subsystem, such as Networking subsystems, memory sub-system and processor subsystem.In addition, electronic equipment 110 and 112 can comprise the radio unit 114 in Networking subsystems.More generally, electronic equipment 110 and 112 can comprise any electronic equipment (maybe can be included in this class of electronic devices any) with Networking subsystems, and this Networking subsystems allows electronic equipment 110 and 112 and another electronic equipment to carry out radio communication.This can comprise transmission beacon over the wireless channel and tentatively contacts each other to enable electronic equipment or detect, exchange follow-up data/management frames (such as connection request) afterwards with the secure option (such as, IPSec) that connects, configures, via this connection transmission and reception grouping or frame etc.
As found out in FIG, wireless signal 116 (representing by jagged line) sends the radio unit 114-1 in electronic equipment 110.These wireless signals 116 are received by the radio unit 114-2 in electronic equipment 112.Particularly, electronic equipment 110 (such as transducer, such as heart rate monitor or computer mouse) in the broadcast of transmitting time place or can send beacon.Then, electronic equipment 112 (such as smart mobile phone) can receive by opening scanning window during transmitting time the existence that one or more beacon carrys out detected electrons equipment 110.Electronic equipment 110 and 112 can be allowed so optionally to connect and communicate with one another.
But because electronic equipment 110 and 112 is asynchronous, therefore electronic equipment 110 may need to send beacon more continually and/or electronic equipment 112 may need to use wider scanning window width, to guarantee to receive beacon.Then, this may need the network subsystem (such as interface circuit) in electronic equipment 110 and 112 more continually and/or be in activity or high power consumption mode within the longer time, and this may increasing power consumption reduce running time of electronic equipment 110 and 112.
In detection technique as described below, electronic equipment 112 can to find after electronic equipment 110 or when reception or determine the clock drift of electronic equipment 110.Such as, electronic equipment 112 can receive via radio communication the information being used to specify clock drift from electronic equipment 110.Alternatively or in addition, electronic equipment 112 can by measuring transmitting time, access the information (such as, information may be loaded previously in electronic equipment 112) that the information that is stored in computer 120 and/or access be stored in the appointment clock drift in electronic equipment 112 via network 118 and determine clock drift.
Utilize the clock drift of electronic equipment 110, electronic equipment 112 can calculate the follow-up transmitting time of the beacon from electronic equipment 110.Electronic equipment 112 can be allowed like this to use less scanning window width.In addition, electronic equipment 112 can provide instruction to increase the time interval (being sometimes referred to as " beacon period ") between beacon transmitting time to electronic equipment 110.In this way, detection technique can allow the network subsystem cost less time under high power consumption mode in electronic equipment 110 and/or 112, thus reduce power consumption and increase electronic equipment 110 and/or 112 battery charging between running time.
Along with passage of time, the uncertainty of transmitting time will increase.Finally, after lock in time, uncertainty is wide enough so that electronic equipment 112 will have to be returned to preliminary sweep window width and/or electronic equipment 110 will have to be returned to initial Beacon Period.Such as, electronic equipment 110 can be connected with 112 and briefly communicate.If not communication between a time interval inner electronic equipment 110 and 112, then electronic equipment 110 and 112 is attempted again communicating, then electronic equipment 112 " can be remembered " electronic equipment 110 and can use the scanning window width of reduction, to connect or the time of this subsequent communications generation after initial examination and measurement to electronic equipment 110 is less than lock in time as long as initial between electronic equipment 110 and 112.Otherwise electronic equipment 110 and 112 can use the scanning window width of initial Beacon Period and/or reduction.
In the method for alternative, electronic equipment 112 can monitor the transmitting time of the subsequent beacon from electronic equipment 110, and synchronous correction can be provided to make synchronously being kept (that is, the uncertainty of transmitting time can keep suffering restraints) between electronic equipment 110 and 112 to electronic equipment 110.This re-synchronization method can be facilitated by network clocking, such as by clock that computer 120, cellular phone network and/or global positioning system such as GPS (thus network clocking can be gps clock) provides.Particularly, electronic equipment 112 can use himself clock and/or network clocking to assess the drift of transmitting time, and synchronous correction (as required) can be provided synchronous with what keep between electronic equipment 110 and 112 to electronic equipment 110 via radio communication.The beacon period continuing to use less scanning window width and/or increase can be allowed like this, thus allow the power consumption continuing reduction electronic equipment 110 and/or 112.
Should be noted, in certain embodiments, after electronic equipment 110 being detected or when, and when not connecting between electronic equipment 110 and 112, carry out synchronous between electronic equipment 110 and 112.Therefore, in bluetooth
tMenvironment in, two-way packet switching may be there is no between electronic equipment 110 and 112 in detection technique.
In the embodiments described, carry out process to the grouping of any one in electronic equipment 110 and 112 or frame to comprise: receive the wireless signal 116 with grouping or frame; From receive wireless signal 116 decode/extract grouping or frame with obtain divide into groups or frame; And process grouping or frame such as, to determine the information (such as, the request in payload or additional information, specify the clock drift of electronic equipment 110 and/or the information of synchronous correction) of dividing into groups or comprising in frame.
Although we are described for the network environment shown in Fig. 1, in the embodiment of alternative, the electronic equipment of varying number or type may be there is.Such as, some embodiments comprise more or less electronic equipment.And for example, in another embodiment, different electronic equipments is sending and/or is receiving grouping or frame.
Fig. 2 gives the sequential chart of communication between the electronic equipment 110 and 112 that illustrates in Fig. 1.In communication period, electronic equipment 110 sends beacon 210 in the transmitting time 212 of being separated by nominal or target initial Beacon Period 214.Because the reason of the clock drift in electronic equipment 110, transmitting time 212 has uncertain 216.Therefore, electronic equipment 112 can open the home window cycle 220 place there is the scanning window of original width 222 (such as scanning window 218) to receive one or more beacon 210, thus detected electrons equipment 110.Particularly, window period 220 can be short and width 222 can be wide.
After electronic equipment 110 being detected, electronic equipment 112 can optionally connect with electronic equipment 110 or with its pairing.(but as previously mentioned, do not connect in certain embodiments.) then, electronic equipment 112 can receive, accesses or determine clock drift and/or beacon period 214.Such as, electronic equipment 112 can: receive from electronic equipment 110 information of clock drift and/or beacon period 214 of being used to specify; Clock drift and/or beacon period 214 is determined according to transmitting time 212; Identifier (media access control address of such as electronic equipment 110 or MAC Address, or the types of models of electronic equipment 110) based on electronic equipment 110 accesses the appointment clock drift and/or the information of beacon period 214 that are stored in computer 120 (Fig. 1); And/or the information of appointment initial Beacon Period and the clock drift be stored in electronic equipment 112 is accessed based on the identifier of electronic equipment 110.Utilize this information, electronic equipment 112 can calculate transmitting time 226 for subsequent beacon 224.These beacons can be received by opening follow up scan window (such as scanning window 232) by electronic equipment 112, and this scanning window has the width (such as width 236) of correction at window period 234 place revised.The window period 234 revised can be less than the home window cycle 220, and the width 236 revised can be less than width 222.As previously mentioned, the power consumption of electronic equipment 112 can significantly be reduced like this.
In addition, after electronic equipment 110 being detected, electronic equipment 112 can provide the beacon period 228 of correction to electronic equipment 110.The beacon period of this correction can be greater than initial Beacon Period 214, significantly can reduce the power consumption of electronic equipment 110 like this.In these embodiments, electronic equipment 112 can also based on revise beacon period 228 calculated for subsequent beacon 224 transmitting time 226.
Because the clock drift in electronic equipment 110, in transmitting time 226, there is the uncertainty 230 of increase.Particularly, the uncertainty of transmitting time 226 may increase in time.Such as, for the clock drift of 2ppm, latter two hour of electronic equipment 110 detected, the uncertainty of accumulation may be 28ms.Electronic equipment 112 can solve the uncertainty of this increase by the width increasing follow up scan window in time pro rata.
Finally, within the time being greater than the lock in time between electronic equipment 110 and 112, electronic equipment 112 may need to be returned to initial examination and measurement technology.Figure 3 illustrates this situation, Fig. 3 gives the sequential chart that communication between electronic equipment 110 and 112 in Fig. 1 is shown.Particularly, after lock in time (it can to detect after electronic equipment more than 110 hours or several days for first time), electronic equipment 112 can open the home window cycle 220 place there is the scanning window of original width 222.Similarly, electronic equipment 110 can be returned to initial Beacon Period 214 when sending beacon.
In certain embodiments, electronic equipment 110 and/or 112 such as receives highly accurate network clocking via network (network 118 in such as Fig. 1).(in certain embodiments, provide network clocking in network normal work period, therefore, it is not special signal.) electronic equipment 112 can clock calculation transmitting time 226 Network Based.In addition, the time (such as, the M/N of network clocking doubly, wherein M and N is integer) that actual transmitting time 226 and clock Network Based can be determined by electronic equipment 112 compares.When difference between actual transmitting time and the transmitting time of calculating exceedes threshold value, electronic equipment 112 can provide synchronous correction to electronic equipment 110.In this way, can, by keeping the uncertainty synchronously retraining transmitting time between electronic equipment 110 and 112, can allow like this to continue to save power.In these embodiments, can keep the constant width of follow up scan window (with increase in time contrary).
The method (being sometimes referred to as " calibration detects ") is shown in Fig. 4, has it gives the sequential chart that communication between electronic equipment 110 and 112 in Fig. 1 is shown.Particularly, uncertainty 410 when sending in one of 226 exceedes threshold value (such as, the sub-fraction of width 236) time, electronic equipment 112 can provide synchronous correction 412 to electronic equipment 110, thus allows electronic equipment 110 regulate follow-up transmitting time and reset or remove uncertainty (at least within a period of time).
Such as, electronic equipment 110 can comprise the clock circuit (clock circuit 828 in such as Fig. 8) with clock drift, and the clock that can export based on clock circuit sends beacon 224 at transmitting time 226 place.If electronic equipment 110 receives network clocking, so clock circuit can also clock output clock Network Based.
When electronic equipment 110 receives synchronous correction 412, electronic equipment 110 can regulate clock circuit based on synchronous correction 412, makes the difference between the multiple of clock (M/N of such as clock doubly) and network clocking be less than threshold value.In this way, the uncertainty 410 of transmitting time 226 can be retrained, thus allow the beacon period 228 that continuation uses window period 234, width 236 and/or revises.
Should be noted, synchronous correction and multiple electronic equipment (such as other " scanning machines ") can be shared, make these other electronic equipments can use this detection technique (comprising the scanning window width of reduction and/or the window period of increase) when their are mutual with electronic equipment 110 for the first time.In addition, use the overall situation or network clocking that communication period between electronic equipment 110 and 112 can be allowed to use anti-replay encryption technology.
Although previous examples illustrates use fixing initial Beacon Period 214 and fixing home window cycle 220 (Fig. 2 and Fig. 3), but in certain embodiments, can Stochastic choice initial Beacon Period and home window cycle (therefore, initial value can be mean value).Such as, during beacon patterns, when electronic equipment 110 (Fig. 1) send beacon and electronic equipment 112 (Fig. 1) scanning for beacon, bluetooth
tMrandom beacon and scanning window technology can be used.Because these activities are not synchronous, so the possibility that scanner (electronic equipment 112) runs into announcement service device (electronic equipment 110) is lower.This statistical method may need to use very wide scanning window width (having suitable negative effect to power consumption) or very long detection time (up to tens of second).By contrast, after detection also optionally connects, detection technique disclosed by the invention allows electronic equipment 110 and 112 to exchange the clock shared, and it allows their synchronously follow-up notices and scanning to reduce power consumption and detection time (it is deterministic now).
In the exemplary embodiment, initial Beacon Period can be 181ms, and the home window cycle can be 900ms, and preliminary sweep window width can be 30ms.These values may cause the average detected time of 3.5s and the power consumption of 500mW.After electronic equipment 110 synchronous electric subset 110 and 112 (Fig. 1) being detected, the beacon period of correction can be 1.8s, and the window period of correction can be 1.8s, and the scanning window width revised can be 100 μ s.Correction value may cause the average detected time of 1.8s (more generally, can select be 0.5-2s detection time) and the power consumption of 300mW.
Fig. 5 gives the flow chart of the method 500 illustrated for communication between electronic in FIG, and such as electronic equipment 112 communicates with electronic equipment 110.During operation, electronic equipment detects another electronic equipment (operation 510) by being received in the beacon of initial Beacon Period broadcast or transmission.Such as, electronic equipment can open the home window cycle place there is the scanning window of original width.Then, electronic equipment optionally connects (operating 512) with another electronic equipment.In addition, electronic equipment reception is used to specify the information of the clock drift of another electronic equipment or determines clock drift (operation 514).Electronic equipment optionally can also provide the beacon period (operation 516) of correction to another electronic equipment.The beacon period of this correction can be greater than initial Beacon Period.
Next, electronic equipment can calculate the transmitting time (operation 518) of the subsequent beacon from another electronic equipment.In addition, electronic equipment can receive subsequent beacon (operation 520) at the transmitting time place calculated from another electronic equipment.Such as, electronic equipment can be opened and have at the window period place revised the scanning window revising width.Should be noted, the width of correction can be less than original width, and the window period revised can be greater than the home window cycle.
In certain embodiments, the communication between calibrated electronic equipment.Particularly, electronic equipment can provide synchronous correction (operation 522) based on clock (clock in such as network clocking or electronic equipment) and actual transmitting time to another electronic equipment.Synchronous correction can allow another electronic equipment to retrain uncertainty in the transmitting time be associated with clock drift.
Fig. 6 gives the flow chart of the method illustrated for communication between electronic in FIG, and such as electronic equipment 110 communicates with electronic equipment 112.During operation, another electronic equipment sends beacon (operation 610) based on initial Beacon Period.Then, another electronic equipment optionally connects (operating 612) with electronic equipment.In addition, another electronic equipment can optionally be provided for specifying the clock drift of another electronic equipment and/or the information (operation 614) of initial Beacon Period.Should be noted, another electronic equipment optionally can receive from electronic equipment the information (operation 616) being used to specify and revising beacon period.
Subsequently, another electronic equipment sends subsequent beacon (operation 618) in the transmitting time based on the beacon period revised.
In the embodiment of calibrated electronic communication between devices, another electronic equipment can receive synchronous correction (operation 620) from electronic equipment.Synchronous correction can allow another electronic equipment to retrain uncertainty in the transmitting time be associated with clock drift.
By these modes, the communication that electronic equipment (interface circuit in such as electronic equipment and/or driver) can promote between electronic equipment with the power consumption reduced and detection time of minimizing.Particularly, noticing or broadcast and detect can be deterministic (and nonstatistical), can allow the interface circuit cost less time under high power consumption mode in electronic equipment like this.In addition, because the beacon transmitted between electronic equipment in the wireless network can be located, so can avoid the contention to rare Internet resources in known or certainty time.The probability of contention can be reduced like this, thus the time quantum that minimizing electronic equipment spends under movable (high power consumption) pattern can be allowed.
Method 500 (Fig. 5) and 600 some embodiments in, extra or less operation can be had.In addition, the order of operation can be changed, and/or single operation is merged in two or more operations.
Further illustrate detection technique in Fig. 7, which show the diagram that communication between electronic equipment 110 and 112 (Fig. 1) is shown.Particularly, electronic equipment 110 can send beacon 710 at the transmitting time place with initial Beacon Period to electronic equipment 112.Electronic equipment 112 can receive one or more beacon 710 by opening at home window cycle place's scanning window with original width then.
When receiving beacon (such as beacon 710-2), optionally set up the connection 712 between electronic equipment 110 and 112.Then, electronic equipment 110 optionally can be provided for the information 714 of specifying clock drift and/or initial Beacon Period to electronic equipment 112.Alternatively or in addition, electronic equipment 112 can optionally based on transmitting time determination clock drift and/or initial Beacon Period.In certain embodiments, the information of clock drift that the appointment be stored in electronic equipment 112 and/or computer 120 is associated with electronic equipment 110 and/or initial Beacon Period optionally accessed by electronic equipment 112.Such as, electronic equipment 112 can ask 716 information, and responsively, computer 120 can provide information 718.
Optionally connecting after 712, electronic equipment 112 optionally can also provide the beacon period 720 of correction to electronic equipment 110.
In addition, electronic equipment 112 can calculate transmitting time from the subsequent beacon of electronic equipment 110 based on the beacon period of clock drift, initial Beacon Period and/or correction.
Subsequently, electronic equipment 110 can send beacon (such as beacon 710-3 and 710-4) having the transmitting time place revising beacon period to electronic equipment 112.Electronic equipment 112 can receive one or more beacon 710-3 and 710-4 by opening the scanning window at correction window period place with correction width then.Because the beacon period revised is greater than initial Beacon Period, correction width is less than original width and/or correction window period is greater than the home window cycle, so electronic equipment 110 and/or 112 can have significant power to save.
In certain embodiments, computer 120 provides network clocking 722 to electronic equipment 110 and/or 112.When the actual transmitting time of the subsequent beacon 710-3 that electronic equipment 112 can use network clocking 722 and electronic equipment 110 to provide and 710-4 exceedes threshold value to the uncertainty or change of determining transmitting time.When this occurs, electronic equipment 112 can provide synchronous correction 724 to electronic equipment 110, and this allows electronic equipment 110 to keep uncertainty to suffer restraints, thus allows electronic equipment 110 and 112 to continue notice each other and detect in certainty mode.
The embodiment of present description electronic equipment.Fig. 8 gives the block diagram that electronic equipment 800 (one of electronic equipment 110 and 112 in such as Fig. 1) is shown.This electronic equipment comprises processing subsystem 810, memory sub-system 812, and Networking subsystems 814.Processing subsystem 810 comprises the one or more equipment being configured to perform calculating operation.Such as, processing subsystem 810 can comprise one or more microprocessor, application-specific integrated circuit (ASIC) (ASIC), microcontroller, programmable logic device and/or one or more digital signal processor (DSP).
Memory sub-system 812 comprises one or more for storing for processing subsystem 810 and the data of Networking subsystems 814 and/or the equipment of instruction.Such as, memory sub-system 812 can comprise dynamic random access memory (DRAM), static RAM (SRAM), and/or the memory of other types.In certain embodiments, the instruction for the processing subsystem 810 in memory sub-system 812 comprises: one or more program module that can be performed by processing subsystem 810 or instruction set (such as program module 822 or operating system 824).Should be noted, one or more computer program can form computer program mechanism.In addition, the instruction in the various modules in memory sub-system 812 realizes by following language: high level language, OO programming language, and/or collects or machine language.In addition, can compile or interpreted programming language, such as configurable or be configured (being used interchangeably in this discussion) become performed by processing subsystem 810.
In addition, memory sub-system 812 can comprise for controlling the mechanism conducted interviews to memory.In certain embodiments, memory sub-system 812 comprises hierarchy of memory, and this hierarchy of memory comprises one or more high-speed caches of the memory be couple in electronic equipment 800.These embodiments some in, the one or more of high-speed cache are arranged in processing subsystem 810.
In certain embodiments, memory sub-system 812 is couple to one or more high power capacity mass memory unit (not shown).Such as, memory sub-system 812 can be couple to the mass memory unit of magnetic or CD drive, solid-state drive or other types.In these embodiments, memory sub-system 812 can be used as the fast access storage device of the data often used by electronic equipment 800, and mass memory unit is used to store the lower data of frequency of utilization.
Networking subsystems 814 comprises and is configured to be coupled to wired and/or wireless network and wired and/or wireless network carries out communicating (namely via this, perform network operation) one or more equipment, comprising: control logic 816, interface circuit 818 and antenna 820.Such as, Networking subsystems 814 can comprise bluetooth
tMnetworked system, cellular networking system are (such as, the 3G/4G network of such as UMTS, LTE etc.), USB (USB) networked system, networked system (such as, Wi-Fi networked system), Ethernet networked system and/or other networked systems based on standard described in IEEE 802.11.
Networking subsystems 814 comprises processor, controller, radio unit/antenna, socket/plug and/or is used for coupling with the networked system of each support, communicates thereon and process other equipment of its data and event.Should be noted, to communicate and the mechanism of the data that process on the network of each network system and event is referred to as " network interface " for this network system sometimes for being coupled to, thereon.In addition, in certain embodiments, " network " between electronic equipment does not still exist.Therefore, electronic equipment 800 can use the mechanism in Networking subsystems 814 to perform the simple radio communication between electronic equipment, notice as sent or beacon frame and/or scanning by other electronic equipments the announcement frame that sends, as previously mentioned.
In electronic equipment 800, processing subsystem 810, memory sub-system 812 and Networking subsystems 814 utilize together with bus 830 is coupled in.Bus 830 can comprise electrical connector, light connector and/or photoelectricity connector, and it can be used for transmitting order and data each other for subsystem.For clarity sake, although merely illustrate a bus 830, different embodiments can comprise the electrical connector of varying number between subsystem or configuration, light connector and/or photoelectricity connector.
In certain embodiments, electronic equipment 800 comprises the display subsystem 826 for showing information over the display, and it can comprise display driver and display, such as liquid crystal display, many touch touch-screens etc.In addition, electronic equipment 800 can comprise the clock circuit 828 of output clock.Should be noted, clock circuit 828 can be included in GPS circuit.
Electronic equipment 800 can be any electronic equipment (maybe can be included in this class of electronic devices any) with at least one network interface.Such as, electronic equipment 800 can be (maybe can be included in following electronic equipment): desktop computer, laptop computer, server, media player (such as MP3 player), equipment, pocket diary computer/net book, panel computer, smart phone, cell phone, a testing equipment, the network equipment, Set Top Box, personal digital assistant (PDA), toy, controller, digital signal processor, game machine, computing engines in equipment, electronic equipment for consumption, portable computing device, personal organizer, transducer, user interface apparatus and/or other electronic equipments.
Although employ particular elements to describe electronic equipment 800, in the embodiment of alternative, different parts and/or subsystem may be there is in electronic equipment 800.Such as, electronic equipment 800 can comprise one or more other processing subsystem 810, memory sub-system 812, Networking subsystems 814 and/or display subsystem 826.In addition, one or more in subsystem may not be present in electronic equipment 800.In addition, in certain embodiments, electronic equipment 800 can comprise unshowned one or more add-on subsystem in Fig. 8.Such as, electronic equipment 800 can include but not limited to data collecting subsystem, audio frequency and/or subsystem of video, alert sub-system, media processing sub-system and/or I/O (I/O) subsystem.In addition, although figure 8 illustrates independently subsystem, in certain embodiments, to other subsystems in some or all be integrated into electronic equipments 800 of stator system or parts or parts one or more in.Such as, in certain embodiments, program module 822 is included in operating system 824.
In addition, the circuit in electronic equipment 800 and parts can use the combination in any of simulation and/or digital circuit to realize, and comprising: bipolarity, PMOS and/or NMOS door or transistor.In addition, the signal in these embodiments can comprise the digital signal with roughly centrifugal pump and/or the analog signal with successive value.In addition, parts and circuit can be single-ended or difference type, and power supply can be unipolarity or bipolarity.
Integrated circuit can realize some or all functions of Networking subsystems 814 such as radio unit.In addition, integrated circuit can comprise for sending wireless signal from electronic equipment 800 and receiving from the hardware of the signal of other electronic equipments and/or software mechanism at electronic equipment 800.Except mechanism as herein described, radio unit is known in the art, so there is no describe in detail.Usually, network subsystem 814 and/or integrated circuit can comprise the radio unit of any amount.Should be noted, the radio unit in multi radio unit embodiment works in the mode being similar to described single radio unit embodiment.
In certain embodiments, Networking subsystems 814 and/or integrated circuit comprise and to be configured to by one or more radio unit carry out via given communication channel (such as given carrier frequency) configuration mechanism (such as one or more hardware and/or software mechanism) that sends and/or receive.Such as, in certain embodiments, this configuration mechanism can be used for radio unit be switched in the monitoring of different communication channels from monitoring on a given communication channel and/or sending and/or send.(should be noted, " monitoring " used herein comprises from other electronic equipment Received signal strength, and may perform one or more process operation to received signal, such as, determine whether received signal comprises announcement frame etc.)
Although will with bluetooth
tMthe communication protocol of operating such is used as illustrative example, but can use the communication technology embodiment of description in various network interface.In addition, although the certain operations in previous embodiment realizes in hardware or in software, in general, the operation in previous embodiment can realize in various configurations and framework.Therefore, some or all operations in previous embodiment can perform or perform in hardware and software simultaneously in hardware, software.Such as, at least some in the firmware examinations technology in program module 822, operating system 824 (such as the driver of interface circuit 818) or interface circuit 818 can be utilized to operate.Alternatively or in addition, can in physical layer, at least some operation in the hardware of such as interface circuit 818 in examinations technology.
In description above, we refer to " some embodiments ".Should be noted, the subset of likely embodiment that what " some embodiments " described is, but not specify the same subsets of embodiment all the time.
Aforesaid description is intended to make any technical staff of this area can realize and use the disclosure, and provides in the context of application-specific and requirement thereof.In addition, only for the object illustrated and describe, the aforementioned description of embodiment of the present disclosure is provided.They be not intended to for exhaustive or the disclosure is limited to disclosed form.Therefore, many amendments and modification will be apparent for the practitioner that this area is skilled, and general principle defined herein can be applied to other embodiments and application under the prerequisite not departing from essence of the present disclosure and scope.In addition, the discussion of previous embodiment is not intended to limit the disclosure.Therefore, the disclosure is not intended to be limited to shown embodiment, but is endowed the most wide region consistent with principle disclosed herein and feature.
Claims (20)
1. a reception electronic equipment, comprising:
Antenna; With
Interface circuit, described interface circuit is couple to described antenna, and be configured to and send electronic equipment and communicate, wherein said interface circuit is configured to:
During scanning window, detect described transmission electronic equipment by receiving the beacon had in one group of beacon of initial Beacon Period, wherein said initial Beacon Period and described interface circuit use the scanning window with home window width and home window cycle;
Clock drift based on described transmission electronic equipment calculates the transmitting time of the subsequent beacon from described transmission electronic equipment; And
Between follow up scan window phase, receive described subsequent beacon from described transmission electronic equipment, described follow up scan window contains the transmitting time calculated of described subsequent beacon, and wherein said follow up scan window has the width being less than described original width.
2. reception electronic equipment according to claim 1, the transmitting time calculated of wherein said subsequent beacon is also based on described initial Beacon Period.
3. reception electronic equipment according to claim 1, wherein after described transmission electronic equipment being detected, described interface circuit is configured to the beacon period providing correction to described transmission electronic equipment;
The beacon period of wherein said correction is greater than described initial Beacon Period; And
The transmitting time calculated of described subsequent beacon is wherein calculated further based on beacon period of described correction.
4. reception electronic equipment according to claim 1, wherein in the follow-up time being greater than the lock in time between described transmission electronic equipment and described reception electronic equipment, described interface circuit be configured to by open the described home window cycle place there is the scanning window of described original width receive described subsequent beacon from described transmission electronic equipment.
5. reception electronic equipment according to claim 1, wherein continue in the time in the rear, the size of described follow up scan window increases in time; And
Increase and the described clock drift of wherein said size are proportional.
6. reception electronic equipment according to claim 1, wherein after described transmission electronic equipment being detected, described interface circuit is configured to the one in below execution: receive the information being used to specify described initial Beacon Period and described clock drift from described transmission electronic equipment; Receive the beacon sent, and determine described initial Beacon Period and described clock drift based on sent beacon; The information of described initial Beacon Period and described clock drift is used to specify via access to netwoks; And access the information of the described initial Beacon Period of appointment and the described clock drift be stored in described reception electronic equipment.
7. reception electronic equipment according to claim 1, wherein said interface circuit is configured to:
Via network reception network clocking, wherein calculated transmitting time is also based on described network clocking;
The described transmitting time of described subsequent beacon and described network clocking are compared; And
When difference between described transmitting time and the transmitting time calculated exceedes threshold value, provide synchronous correction to described transmission electronic equipment.
8. a reception electronic equipment, comprising:
Antenna;
Interface circuit, described interface circuit is couple to described antenna, is configured to and sends electronic equipment and communicate;
Processor; With
Memory, wherein said memory storage program module, and wherein said program module is configured to perform to receive beacon from other electronic equipments by described processor, and described program module comprises:
For detecting the instruction of described transmission electronic equipment during scanning window by receiving beacon, wherein said interface circuit uses the scanning window with home window width and home window cycle;
For calculating the instruction of the transmitting time of the subsequent beacon from described transmission electronic equipment based on the clock drift of described transmission electronic equipment; And
For receiving the instruction of described subsequent beacon between follow up scan window phase from described transmission electronic equipment, described follow up scan window contains the transmitting time calculated of described subsequent beacon, and wherein said follow up scan window has the width being less than described original width.
9. reception electronic equipment according to claim 8, wherein said program module be included in the described instruction for detecting described transmission electronic equipment after the instruction for providing the beacon period of correction to described transmission electronic equipment;
The beacon period of wherein said correction is greater than the initial Beacon Period used when sending described beacon by described transmission electronic equipment; And
The transmitting time calculated of described subsequent beacon is wherein calculated further based on beacon period of described correction.
10. reception electronic equipment according to claim 8, wherein said program module comprises: in the follow-up time being greater than the lock in time between described transmission electronic equipment and described reception electronic equipment, for receiving the instruction of described subsequent beacon during place has the scanning window of described original width in the described home window cycle from described transmission electronic equipment.
11. reception electronic equipments according to claim 8, wherein said program module be included in the described instruction for detecting described transmission electronic equipment after the instruction for the one in following: the information receiving the initial Beacon Period being used to specify described clock drift and used by described transmission electronic equipment when sending described beacon from described transmission electronic equipment; Receive the beacon sent, and determine described initial Beacon Period and described clock drift based on sent beacon; The information of described initial Beacon Period and described clock drift is used to specify via access to netwoks; And access the information of the described initial Beacon Period of appointment and the described clock drift be stored in described reception electronic equipment.
12. reception electronic equipments according to claim 8, wherein said program module comprises:
For the instruction via network reception network clocking, wherein calculated transmitting time is also based on described network clocking;
For the instruction that the described transmitting time of described subsequent beacon and described network clocking are compared; And
For providing the instruction of synchronous correction to described transmission electronic equipment when difference between described transmitting time and the transmitting time calculated exceedes threshold value.
13. 1 kinds for sending electronic equipment and receiving the method for communication between electronic, wherein said method comprises:
During scanning window, utilize the interface circuit in described reception electronic equipment to receive beacon, wherein said scanning window has home window width;
Clock drift based on described transmission electronic equipment calculates the transmitting time of the subsequent beacon from described transmission electronic equipment; And
Between follow up scan window phase, receive described subsequent beacon from described transmission electronic equipment, described follow up scan window contains the transmitting time calculated of described subsequent beacon, and wherein said follow up scan window has the width being less than described original width.
14. methods according to claim 13, wherein after receiving described beacon, described method also comprises the beacon period providing correction to described transmission electronic equipment;
The beacon period of wherein said correction is greater than the initial Beacon Period used by described transmission electronic equipment when sending described beacon; And
The transmitting time calculated of described subsequent beacon is wherein calculated further based on beacon period of described correction.
15. methods according to claim 13, wherein after receiving described beacon, described method also comprise following in one: the information receiving the initial Beacon Period being used to specify described clock drift and used by described transmission electronic equipment when sending described beacon from described transmission electronic equipment; Receive the beacon sent, and determine described initial Beacon Period and described clock drift based on sent beacon; The information of described initial Beacon Period and described clock drift is used to specify via access to netwoks; And access the information of the described initial Beacon Period of appointment and the described clock drift be stored in described reception electronic equipment.
16. methods according to claim 13, wherein said method also comprises:
Via network reception network clocking, wherein calculated transmitting time is also based on described network clocking;
The described transmitting time of described subsequent beacon and described network clocking are compared; And
When difference between described transmitting time and the transmitting time calculated exceedes threshold value, provide synchronous correction to described transmission electronic equipment.
17. 1 kinds of transmission electronic equipments, comprising:
Antenna; With
Interface circuit, described interface circuit is couple to described antenna, and be configured to and receive electronic equipment and communicate, wherein said interface circuit is configured to:
Beacon is sent based on initial Beacon Period;
Receive the beacon period revised from described reception electronic equipment, the beacon period of wherein said correction is greater than described initial Beacon Period; And
Beacon period based on described correction sends beacon.
18. transmission electronic equipments according to claim 17, wherein said transmission electronic equipment also comprises the clock circuit with clock drift; And
Wherein send described beacon based on the clock exported by described clock circuit in transmitting time.
19. transmission electronic equipments according to claim 18, wherein said interface circuit is configured to:
Via network reception network clocking, wherein said clock circuit exports described clock based on described network clocking;
Synchronous correction is received from described reception electronic equipment; And
Regulate described clock circuit based on described synchronous correction, make the difference between the multiple of described clock and described network clocking be less than threshold value.
20. transmission electronic equipments according to claim 17, wherein when sending described beacon, described interface circuit is configured to the information being provided for specifying described initial Beacon Period and described clock drift to described reception electronic equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711111500.2A CN107889201B (en) | 2014-03-21 | 2015-03-11 | Synchronous low energy detection technique |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14/222,264 | 2014-03-21 | ||
| US14/222,264 US9585097B2 (en) | 2014-03-21 | 2014-03-21 | Synchronized low-energy detection technique |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711111500.2A Division CN107889201B (en) | 2014-03-21 | 2015-03-11 | Synchronous low energy detection technique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104935390A true CN104935390A (en) | 2015-09-23 |
| CN104935390B CN104935390B (en) | 2017-11-14 |
Family
ID=54053852
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510106272.4A Active CN104935390B (en) | 2014-03-21 | 2015-03-11 | Synchronous low energy detection technique |
| CN201711111500.2A Active CN107889201B (en) | 2014-03-21 | 2015-03-11 | Synchronous low energy detection technique |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711111500.2A Active CN107889201B (en) | 2014-03-21 | 2015-03-11 | Synchronous low energy detection technique |
Country Status (4)
| Country | Link |
|---|---|
| US (3) | US9585097B2 (en) |
| JP (1) | JP6202578B2 (en) |
| CN (2) | CN104935390B (en) |
| DE (2) | DE102015017304B3 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10454768B2 (en) | 2013-11-15 | 2019-10-22 | F5 Networks, Inc. | Extending policy rulesets with scripting |
| US9585097B2 (en) | 2014-03-21 | 2017-02-28 | Apple Inc. | Synchronized low-energy detection technique |
| KR101988861B1 (en) * | 2016-03-02 | 2019-06-13 | 한국전자통신연구원 | Network join method and network device |
| US10326700B1 (en) * | 2016-03-29 | 2019-06-18 | F5 Networks, Inc. | Hash based per subscriber DNS based traffic classification |
| US10178625B2 (en) * | 2016-07-07 | 2019-01-08 | Tile, Inc. | Power Preservation in GPS-Equipped Tracking Devices |
| JP6846164B2 (en) * | 2016-11-01 | 2021-03-24 | 矢崎エナジーシステム株式会社 | Wireless communication equipment and wireless communication system |
| US11395125B2 (en) | 2019-08-29 | 2022-07-19 | Itron, Inc. | Power-efficient passive discovery by network devices |
| US11399272B2 (en) * | 2019-08-29 | 2022-07-26 | Itron, Inc. | Power-efficient passive discovery by network devices |
| CN115484576A (en) * | 2021-05-31 | 2022-12-16 | 华为技术有限公司 | Online detection method and equipment based on heartbeat packet |
| KR102459538B1 (en) * | 2021-10-22 | 2022-10-27 | 주식회사 노드톡스 | Control method of node included in bluetooth low energy based low-power mesh network |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1525705A (en) * | 2002-11-27 | 2004-09-01 | Native WI-FI architecture for 802.11 networks | |
| US20050249173A1 (en) * | 2004-05-05 | 2005-11-10 | Juha Salokannel | Adaptive beacon period in a distributed network |
| CN1698314A (en) * | 2003-01-07 | 2005-11-16 | 索尼株式会社 | Radio communication device, radio communication system, and radio communication method |
| CN101444130A (en) * | 2004-10-26 | 2009-05-27 | 摩托罗拉公司 | Method of scanning for beacon transmissions in a WLAN |
| CN101449619A (en) * | 2006-05-22 | 2009-06-03 | 苹果公司 | Power efficient wireless network detection |
| US20120127902A1 (en) * | 2010-11-23 | 2012-05-24 | Alaa Muqattash | System and method for mac layer clock drift compensation |
Family Cites Families (58)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6134283A (en) * | 1997-11-18 | 2000-10-17 | Amati Communications Corporation | Method and system for synchronizing time-division-duplexed transceivers |
| JP2003101439A (en) | 2001-09-25 | 2003-04-04 | Seiko Epson Corp | Radio communication equipment |
| US6671525B2 (en) * | 2001-12-13 | 2003-12-30 | Motorola, Inc. | Beacon assisted hybrid asynchronous wireless communications protocol |
| JP2005260987A (en) | 2003-09-30 | 2005-09-22 | Sharp Corp | Communication system, base station, terminal station, communications apparatus, communication management method, control program, and computer-readable recording medium with the program stored |
| US7586864B2 (en) * | 2003-09-30 | 2009-09-08 | Sharp Kabushiki Kaisha | Communication system, base station, terminal, communication device, communication management method, control program, and computer-readable recording medium containing the same |
| US7668126B2 (en) * | 2004-02-05 | 2010-02-23 | Texas Instruments Incorporated | Beacon coordination and medium access |
| JP4577019B2 (en) * | 2004-03-04 | 2010-11-10 | ソニー株式会社 | Wireless communication system, wireless communication apparatus, wireless communication method, and computer program |
| EP1578095B1 (en) * | 2004-03-17 | 2006-06-28 | Alcatel | Method for controlling the sleep mode on a mobile terminal, corresponding mobile terminal and corresponding radio access node |
| BRPI0509065A (en) * | 2004-03-24 | 2007-08-21 | Koninkl Philips Electronics Nv | method for a beacon period protocol and distributed beacon apparatus for a device in an ad hoc network |
| US7558289B1 (en) * | 2004-06-17 | 2009-07-07 | Marvell International Ltd. | Method and apparatus for providing quality of service (QOS) in a wireless local area network |
| US7570612B1 (en) * | 2004-09-07 | 2009-08-04 | Marvell International Ltd. | Multi-band communications for a single wireless base station |
| KR100593944B1 (en) * | 2005-05-03 | 2006-06-30 | 삼성전기주식회사 | Device of wireless personal area network, and method for control beacon receipt thereof |
| JP4715293B2 (en) * | 2005-05-10 | 2011-07-06 | ソニー株式会社 | Wireless communication system, wireless communication apparatus, wireless communication method, and computer program |
| KR101030201B1 (en) * | 2006-01-11 | 2011-04-22 | 퀄컴 인코포레이티드 | Methods and apparatus relating to timing and/or synchronization including the use of wireless terminal beacon signals |
| US20070242634A1 (en) * | 2006-04-18 | 2007-10-18 | Motorola, Inc. | Method and apparatus for message transmission within a communication system |
| JP4928864B2 (en) | 2006-08-11 | 2012-05-09 | 株式会社オサシ・テクノス | Network system |
| WO2008035140A1 (en) * | 2006-09-19 | 2008-03-27 | Nxp B.V. | Method and system for synchronizing a local clock in a wireless device to a host clock in a wireless host |
| US20080232270A1 (en) * | 2007-03-22 | 2008-09-25 | Kristoffer Fleming | Systems and arrangements for power conservation in network devices |
| US20080240163A1 (en) * | 2007-04-02 | 2008-10-02 | Texas Instruments Incorporated | System and method for maintaining transmission synchrony |
| JP2010537587A (en) * | 2007-08-22 | 2010-12-02 | クゥアルコム・インコーポレイテッド | Wireless Ethernet (registered trademark) adapter |
| CN101217330B (en) * | 2008-01-02 | 2012-07-25 | 中兴通讯股份有限公司 | A method and device for time synchronism calibration |
| WO2009104336A1 (en) * | 2008-02-21 | 2009-08-27 | 日本電信電話株式会社 | Method for wireless base station search, device for wireless base station search, and program for wireless base station search |
| CN101843150B (en) * | 2008-06-30 | 2013-08-14 | 松下电器产业株式会社 | Radio communication device, terminal, system, and program |
| US8576759B2 (en) * | 2008-07-11 | 2013-11-05 | Marvell World Trade Ltd. | Partial power save mode for access points during device discovery |
| KR101481586B1 (en) * | 2008-09-04 | 2015-01-12 | 엘지전자 주식회사 | Method for communcation time allocation of multiple radio |
| US20100093279A1 (en) * | 2008-10-14 | 2010-04-15 | Qualcomm Incorporated | Electronic devices for communication utilizing energy detection and/or frequency synthesis |
| US8943305B2 (en) * | 2009-01-30 | 2015-01-27 | Texas Instruments Incorporated | Frame structure for medium access in body area networks (BAN) |
| CN102308664A (en) * | 2009-02-06 | 2012-01-04 | 株式会社Ntt都科摩 | Mobile terminal and mobile terminal data relay method |
| US8737917B2 (en) * | 2009-07-24 | 2014-05-27 | Broadcom Corporation | Method and system for a dual-mode bluetooth low energy device |
| US8428518B2 (en) * | 2009-09-11 | 2013-04-23 | Intel Corporation | Traffic constraints in a mmWAVE wireless network |
| KR101718768B1 (en) * | 2009-12-21 | 2017-03-22 | 삼성전자주식회사 | Apparatus and method for reducing power consumption in portable terminal |
| US9392565B2 (en) | 2010-03-05 | 2016-07-12 | Samsung Electronics Co., Ltd. | Method and system for accurate clock synchronization through interaction between communication layers and sub-layers for communication systems |
| US8837530B2 (en) * | 2010-03-12 | 2014-09-16 | University Of Maryland | Method and system for adaptive synchronization of timing information generated by independently clocked communication nodes |
| WO2012046391A1 (en) * | 2010-10-07 | 2012-04-12 | パナソニック株式会社 | Wireless communication device, wireless communication method and processing circuit |
| GB201105588D0 (en) * | 2011-04-01 | 2011-05-18 | Elliptic Laboratories As | User interface |
| CN102158950A (en) * | 2011-04-26 | 2011-08-17 | 上海华为技术有限公司 | Clock synchronization method, system, device and base station |
| US20130003715A1 (en) * | 2011-06-29 | 2013-01-03 | Texas Instruments Incorporated | Connection setup for low energy wireless networks based on master device packet that includes timing information |
| US20130034004A1 (en) * | 2011-08-02 | 2013-02-07 | Qualcomm Atheros, Inc. | Reference tbtt estimation algorithm for smart power saving on wlan client |
| US9125152B2 (en) | 2011-08-16 | 2015-09-01 | Utc Fire & Security Corporation | Beacon synchronization in wifi based systems |
| US20130183906A1 (en) * | 2012-01-12 | 2013-07-18 | Qualcomm Incorporated | Enhanced distributed synchronization for wireless communications |
| US9936454B2 (en) * | 2012-03-12 | 2018-04-03 | Agency For Science, Technology And Research | Stations, access points, communication systems and methods of controlling the same |
| WO2013184889A1 (en) * | 2012-06-08 | 2013-12-12 | Marvell World Trade Ltd. | Method and apparatus for restricting channel access to a wireless station operating in accordance with a power saving scheme |
| US9398519B2 (en) * | 2012-06-22 | 2016-07-19 | Apple Inc. | Beacon frame monitoring |
| US10321453B2 (en) * | 2012-06-26 | 2019-06-11 | Futurewei Technologies, Inc. | System and method for allocating periodic resources |
| US9408147B2 (en) * | 2012-09-24 | 2016-08-02 | Broadcom Corporation | Enhanced rate physical layer for Bluetooth™ low energy |
| US9066197B2 (en) * | 2013-01-22 | 2015-06-23 | Nokia Corporation | Method, apparatus, and computer program product for power save control for tethering connections |
| KR20140111513A (en) * | 2013-03-11 | 2014-09-19 | 삼성전자주식회사 | Method and appratus for wireless communication |
| US9510286B2 (en) * | 2013-03-27 | 2016-11-29 | Qualcomm Incorporated | Systems and methods for synchronization within a neighborhood aware network |
| US9154934B2 (en) * | 2013-03-28 | 2015-10-06 | Futurewei Technologies, Inc. | System and method for pre-association discovery |
| CN103347292A (en) * | 2013-07-02 | 2013-10-09 | 北京播思无线技术有限公司 | Device and method for reducing WIFI power consumption |
| US9788288B2 (en) * | 2014-01-13 | 2017-10-10 | Qualcomm Incorporated | Systems and methods for reducing power consumption in wireless communication |
| US9648485B2 (en) * | 2014-02-03 | 2017-05-09 | Qualcomm Incorporated | Discovery of a neighbor awareness network (NAN) using a wake up message |
| US9585097B2 (en) | 2014-03-21 | 2017-02-28 | Apple Inc. | Synchronized low-energy detection technique |
| US9949200B2 (en) * | 2014-05-27 | 2018-04-17 | Apple Inc. | Centralized beacon management service |
| US9485734B2 (en) * | 2014-06-30 | 2016-11-01 | Intel Corporation | Wireless communication system method for synchronizing Bluetooth devices based on received beacon signals |
| US9998867B2 (en) * | 2014-09-29 | 2018-06-12 | Apple Inc. | Content discovery using beacons |
| US20160095061A1 (en) * | 2014-09-30 | 2016-03-31 | Apple Inc. | Reduced power consumption using coordinated beacon skipping |
| EP3409031B1 (en) * | 2016-01-29 | 2019-05-08 | Telefonaktiebolaget LM Ericsson (PUBL) | Improved advertising scheme |
-
2014
- 2014-03-21 US US14/222,264 patent/US9585097B2/en active Active
-
2015
- 2015-03-11 CN CN201510106272.4A patent/CN104935390B/en active Active
- 2015-03-11 CN CN201711111500.2A patent/CN107889201B/en active Active
- 2015-03-18 DE DE102015017304.9A patent/DE102015017304B3/en active Active
- 2015-03-18 DE DE102015204865.9A patent/DE102015204865B4/en active Active
- 2015-03-20 JP JP2015057177A patent/JP6202578B2/en active Active
-
2017
- 2017-02-27 US US15/444,043 patent/US10104615B2/en active Active
-
2018
- 2018-10-15 US US16/160,503 patent/US10681640B2/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1525705A (en) * | 2002-11-27 | 2004-09-01 | Native WI-FI architecture for 802.11 networks | |
| CN1698314A (en) * | 2003-01-07 | 2005-11-16 | 索尼株式会社 | Radio communication device, radio communication system, and radio communication method |
| US20050249173A1 (en) * | 2004-05-05 | 2005-11-10 | Juha Salokannel | Adaptive beacon period in a distributed network |
| CN101444130A (en) * | 2004-10-26 | 2009-05-27 | 摩托罗拉公司 | Method of scanning for beacon transmissions in a WLAN |
| CN101449619A (en) * | 2006-05-22 | 2009-06-03 | 苹果公司 | Power efficient wireless network detection |
| US20120127902A1 (en) * | 2010-11-23 | 2012-05-24 | Alaa Muqattash | System and method for mac layer clock drift compensation |
Also Published As
| Publication number | Publication date |
|---|---|
| US20170171819A1 (en) | 2017-06-15 |
| DE102015204865A1 (en) | 2015-09-24 |
| US20150271754A1 (en) | 2015-09-24 |
| JP2015186265A (en) | 2015-10-22 |
| JP6202578B2 (en) | 2017-09-27 |
| US10104615B2 (en) | 2018-10-16 |
| DE102015204865B4 (en) | 2019-03-21 |
| CN107889201B (en) | 2021-02-09 |
| US9585097B2 (en) | 2017-02-28 |
| CN107889201A (en) | 2018-04-06 |
| US10681640B2 (en) | 2020-06-09 |
| CN104935390B (en) | 2017-11-14 |
| US20190082391A1 (en) | 2019-03-14 |
| DE102015017304B3 (en) | 2023-09-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104935390A (en) | Synchronized low-energy detection technique | |
| CN109564539B (en) | Remote debugging and management | |
| TWI557550B (en) | Application-aware radio power saving | |
| CN105610469A (en) | Wireless proximity pairing of user-interface devices | |
| CN104412629B (en) | The method and electronic equipment connected at once after discovering device | |
| US11487688B2 (en) | Technologies for fast MAUSB enumeration | |
| CN105247487A (en) | A parallel method for agglomerative clustering of non-stationary data | |
| TW201419928A (en) | Dynamically adapting wireless communication | |
| CN111585817B (en) | Power-saving mode switching method and device | |
| EP3716582B1 (en) | Method and system for data transmission between a sensor device and an electronic device | |
| US9572120B2 (en) | Synchronization requests to reduce power consumption | |
| WO2019019285A1 (en) | Resource control method and apparatus | |
| CN104919425A (en) | Systems and methods for device-to-cloud message delivery | |
| WO2019015051A1 (en) | Method and apparatus for switching operating modes | |
| WO2015154391A1 (en) | Method and device for processing power consumption of radio access network | |
| CN104168145A (en) | System and method for conducting wireless updating on wireless communication units | |
| CN102932208A (en) | Site monitoring method and device | |
| CN108307422A (en) | Data transmission method, device and WiFi probe devices | |
| US9877355B2 (en) | Wireless communicator connectable to different types of wireless communication networks | |
| US20220124625A1 (en) | Signal processing method and apparatus, and device | |
| CN108768464B (en) | Radio frequency data transmission method and system | |
| WO2019019286A1 (en) | Method and apparatus for controlling power | |
| CN109361422A (en) | Spreading factor method of adjustment and device in wide area network | |
| WO2024032489A1 (en) | Prs receiving method and apparatus, and terminal | |
| US12107723B2 (en) | Systems and methods of deploying a program to a distributed network |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |